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Jonathan Ellis commented on CASSANDRA-3383:
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The idea with the query cache is that you'd be saying "here's a query that I do
a lot, that does a cacheable subset of the row." So... no, I don't see where a
separate upper bound concept really makes sense (since slice queries already
have a count limit, and name queries are obviously limited by nature).
> Make Row cache reject wide rows which are more than x columns
> -------------------------------------------------------------
>
> Key: CASSANDRA-3383
> URL: https://issues.apache.org/jira/browse/CASSANDRA-3383
> Project: Cassandra
> Issue Type: Improvement
> Components: Core
> Affects Versions: 1.1
> Environment: Linux with Sun JDK
> Reporter: Vijay
> Assignee: Vijay
> Priority: Minor
>
> The problem with the row cache is it has to cache the whole row into the
> memory, this works great for small rows but not for the wide rows. Even
> off-heap cache has to read everything into the heap eventually causing GC
> overhead (If your query is to get few columns).
> It will be nice to reject the rows which are bigger than x columns (This can
> be a KS setting).... this will help cases where we have mixed load of small
> and wide column datasets in the same cf.
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